John beery



(No Model.)

J. BERRY.

MECHANICAL MOVEMENT.

Patented Mar. 1, 1887.

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JOHN BERRY, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE NATIONAL NEEDLE COMPANY, OF SAME PLACE.

wieci-iAnicAL MOVEMENT.

FEPECIFICATIQN forming part of Letters Patent No. 358,758, dated March 1, 1887.

(No model.)

T 0 aZZ whom it may concern:

Be it known that I, JOHN BERRY, a citizenof the United States, residing at Springfield, in the county of Hampden and State of bias sachusetts, have invented new and useful Improvements in Mechanical Motion, of which the following is a specification.

This invention relates to the organization of certain mechanical elements for the purpose of producing a peculiar mechanical movement, the object being to impart to a workholding table, by improved means, a continuous rotary motion embodying alternating fast and slow movements; and the invention consists in the peculiar construction and arrangement of the parts of the machine, whereby said movements are given to the table, as hereinafter fully described, and pointed out in the claims.

In the drawings forming part of this specification, Figure 1 is a side elevation, partly in section, of a mechanical construction containing mechanism for producing said mechanical motion which embodies my invention, said figure showing the edges of the table and the revolving turret partly broken away. Fig. 2 is a plan View of the central portion of the turret and of a clamping-hub thereon. Fig. 3 isa plan view of the table, the turret, and the tablerevolving mechanism inelosed in said table and turret, the tops of the latter being removed, thereby showing the borders thereof in section.

In the drawings, 3 indicates a suitable hollow table, preferably of metal, under or-within which a portion of themechanism which actuates the turret 4. is located. The said turret is of circular form, having a pending border, 5, and is supported and adapted to rotate just above the surface of said table, as below described.

A central hub orshaft-support, 6, is secured on the table 3, through which the lower reduced end of a shaft, 7, passes, and on which the latter rests, as shown in Fig. 1. Said shaft has in its upper end, as shown in Figv 2, a transverse clutch-slot, 8, and a central cylindrical perforation, 9, which serves as a step for the lower end of the main driving-shaft 10. On thclower end of the shaft 7, under the top of the table 3, is secured a gear, 1], (see Fi 1,) and said shaft extends upward through a split hub. 12, which is bolted to the top of the turret. Said hub 12 has a cylindrical chamber in it, surrounding the shaft 7, in which is placed a frictional sleeve, 13, preferably of leather, and a clampingcollar, 14, is placed on the hub 12, provided with a suitable setserew, 15, whereby the upwardly-prejecting ends of said hub are moved toward each other, in order to so clamp said sleeve 13 between the hub and shaft 7 as to create a certain amount of frictional resistance, for the purpose hereinafter described.

The aforesaid main drivingshaft 10 has its lower end stepped in the upper end of said shaft 7, and is given a rotary motion by a geared connection with any suitable driving mechanism. The shaft 10 has thereon a sliding clutch-collar, 17, which has a spline-connection with said shaft, and on its lower side are clutch-teeth, as shown, which are of suitable form to engage in the above-referred-to cl utchslot '8 in the upper end of the shaft 7. By means of the said clutclrcollar 17 the turret a is engaged with or disengaged from the main driving-shaft to provide for stopping the rotary movement of the turret when it may be desirable.

Two short shafts, 18, having suitable bearings in the top of the table 3, or in boxes secured to the latter, as shown in Figs. 1 and 2, have their upper ends projecting into. the under side of the turret 4, near the opposite sides of the border 5 thereof. The shafts 18 have each a gear, 19, on their lower ends, which gears are connected with said gear 11 by two intermediate gears, 20, whereby by the rotation of the shafts 7 the said shafts 18 are also made to rotate.

On the inner side of the aforesaid pending border of the turret 4 are formed several projections, 21, as shown in Figs. 1 and 3, and the faces of said projections are all in the same circular plane. On the upper ends of said shafts 18 are fixed pulleys 22, having their surfaces covered with leather or other similar elastic frictional material, and the faces of the pulleys 22 are adjusted to rotate in frictional contact with the faces of the aforesaid projections 2.1.

ICQ

on the inner side of the border of the turret 4, to impart to the latter a rotary motion governed by the speed of the rotation of the said pulleys 22, and the said rotary motion of the turret is so governed and controlled by the movement of the pulleys 22 so long as the surfaces of said projections 21 are in contact with said pulleys.

It will be understood from the above-described construction that the speed of the shaft 7 is that of the main driving-shaft 10, and that by means of the above-described geared connection between the shaft 7 and the shafts 18 the latter are made to run at a very much slower speed than the shaft 7. It will also be observed that, owing to the difference in the diameters of the pulleys 22 on said shafts 18, and the border of the turret with which said pulleys engage,theturret wil1 rotate at a much slower speed than that of said pulleys.

As a result of the above-described construction and the connection of the turret 4 directly and indirectly with the rotating shaft 7, the turret, when uninterrupted by any engagement, as aforesaid, with the pulleys 22, rotates at the same speed as the shaft 7 by reason of its frictional engagement with the latter by means of said frictionsleeve 13 and the clamping-hub 12; but when the projections 21 swing into engagement with the pulleys 22 the rotating speed of the turret is instantly reduced to that which is imparted to it by said pulleys, the shafts 7 meanwhile rotating within the said hub 12; but since the frictional power of the pulleys 22 to rotate the turret is greater than the frictional resistance which the latter meets with, by reason of its frictional attachment to shaft 7, the pulleys control the speed ofthe turret when in engagement therewith, and when the projections 21 pass by said pulleys the rotation of the turret is controlled by shaft 7 and its speed is instantly increased, so that other projections 21 quickly swing in engagement with the pulleys 22. Thus said turret is caused to rotate with said alternating quick and slow movements in order to provide for moving work which may be secured to the turret slowly while being operated upon, and then quickly to other operating de vices, thereby economizi n g in time which would otherwise be Wasted did the turret have a continuous slow motion, and providing by the latter, which occurs at intervals, for placing work on the turret while it is revolving.

The construction herein illustrated is that which is adapted to be used in connection with any suitable devices for holding small articles to be operated upon alternately while the turret 4 rotates with the above-desoribed alternating quick and slow motions, said devices for holding work being vises orother similar mechanical means for holding needles or small metallic articles which require successive operations to be performed upon them while they are carried around by the turret. One manner of utilizing the mechanism herein described for holding and rotating metallic articles to bring them successively into engagement with grinding-wheels is shown and described in another application filed by me October 25 1886, Serial N 0. 217,118. The essential advantage afforded by the said alternating quick and slow rotary motions of the turret 4 consists in the opportunity which is afforded by the slow motion of the turret for placin g articles thereon and removing others while the turret is in motion, and its quick motion serves to avoid the loss of time by causing the articles carried thereby to be moved quickly from point to point during said operations.

What I claim as my invention is- 1. In combination, the turret 4, having the projections 21 on its border, the hub 12, secured on said turret, having a yielding frictional lining, the shaft 7, passing through said frictionally-lined hub and having an engagement with a driving-shaft, and the two shafts 18, having pulleys thereon engaging with said projections 21 on the turret, and having a geared connection, substantially as described, with said shaft 7, whereby their speed of rotation is reduced below that of said shaft, substantially as set forth.

2. The shaft 7, having an engagement with a driving-shaft, substantially as described, the turret 4, having a frictional engagement, substantially as described, with said shaft 7, whereby it is given a rotary motion,combined with the shafts 18, having pulleys thereon whose faces engage at intervals with said turret and thereby control its motion in opposition to the rotating force of said shaft 7, and intermediate gearing, substantially as described, connecting the shaft 7 and the shafts 18, substantially as set forth.

JOHN BERRY.

Vitnesses:

H. A. GHAPIN, WM. H. CHAPIN. 

